Free Industrial Chemistry MCQs with Answers
292 Industrial Chemistry MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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Read the Industrial Chemistry notesFree MDCAT chapter notes with key terms292 questions · page 6 of 15
- A. MgO
- B. Al2O3
- C. CaO
- D. SiO2
Explanation: Silicon dioxide (SiO2), also known as silica, typically makes up the highest percentage by weight in cement.
Correct answer: SiO2- A. Visible light region
- B. Infra-red region
- C. X-ray region
- D. Ultra-violet region
Explanation: When electrons in a hydrogen atom transition from higher energy levels to the n = 1 (ground) energy level, they release energy in the form…
Correct answer: Visible light region- A. Sodium propionate + Gum + Glycemle
- B. Sodium palmitate + Glycerine
- C. Sodium potassium stearate + Gum + Glycerine
- D. Sodium stearate + Wax + Glycerine
Explanation: Shaving soaps are formulated to produce a stable and lasting lather. They are typically made from potassium salts of fatty acids like…
Correct answer: Sodium potassium stearate + Gum + Glycerine- A. Triglyceride
- B. Oil and fat
- C. Soap
- D. Ester
Explanation: Triacylglycerol (or triglyceride) is the chemical name for a fat or oil, which is a type of ester.
Correct answer: Soap- A. Filtration
- B. Fractional distillation
- C. Steam distillation
- D. Fractional sublimation
Explanation: Crude petroleum contains many components with different boiling points.
Correct answer: Fractional distillation- A. Cotton seed oil
- B. Pea oil
- C. Coconut oil
- D. All of these
Explanation: Crude cottonseed oil contains a naturally occurring polyphenol toxin called gossypol.
Correct answer: Cotton seed oil- A. Barbituric acid
- B. Barbital
- C. Malonic ester
- D. Parabanic acid
Explanation: The core structure of barbiturates is barbituric acid. This parent compound is synthesized through the condensation reaction of a malonic…
Correct answer: Malonic ester- A. Analgesics
- B. Antiallergics
- C. Antidepressants / Anxiolytics
- D. None
Explanation: Benzodiazepines, such as diazepam (Valium), are primarily used to treat anxiety (anxiolytics), but also have sedative and muscle-relaxant…
Correct answer: Antidepressants / Anxiolytics- A. Cl2
- B. I2
- C. SO2
- D. Br2
Explanation: Chlorine, iodine (as tincture of iodine), and sulfur dioxide are all used as inorganic antiseptics or disinfectants.
Correct answer: Br2110. Reforming:
- A. Increases knocking of internal combustion engine
- B. Increases the octane number
- C. More is the knocking the better is the fuel
- D. To produce a fuel of less octane number
Explanation: Reforming is a process used in the petroleum industry to increase the octane number of gasoline.
Correct answer: Increases the octane number- A. A and C
- B. A and B
- C. B and C
- D. B and D
Explanation: Saturated fatty acids like palmitic acid and stearic acid are commonly added to paraffin wax in candle making.
Correct answer: A and B- A. -OH and -NHCHO groups
- B. -OH and -NHCH₃ groups
- C. -NHCOCH₃ and -SO₂NH₂ groups
- D. -OH and -NHCOCH₃ groups
Explanation: The structure of paracetamol (acetaminophen) consists of a benzene ring substituted with a hydroxyl group (-OH) and an acetamide group…
Correct answer: -OH and -NHCOCH₃ groups- A. Antipyretics
- B. Tranquilizers / Hypnotics
- C. Analgesics
- D. None of the above
Explanation: Tranquilizers are drugs that reduce anxiety and tension, while hypnotics are drugs that induce sleep.
Correct answer: Tranquilizers / Hypnotics- A. Spirit - soluble dyes
- B. Ether - soluble dyes
- C. Direct dyes
- D. Basic dyes
Explanation: Solvent dyes are dyes that are soluble in organic solvents rather than water.
Correct answer: Spirit - soluble dyes- A. -OH
- B. -NR₂
- C. -SO₃H
- D. -COOH
Explanation: Basic groups, such as the amino group (-NH₂) or a substituted amino group (-NR₂), can be protonated in an acidic solution.
Correct answer: -NR₂- A. Very unstable molecule having half-life 1/2 to 1 year
- B. Unstable molecule having half-life 2 to 5 years
- C. Stable molecule having half-life 5 to 8 years
- D. Very stable molecule having half-life 10 to 15 years
Explanation: DDT is a persistent organic pollutant known for its extreme stability and resistance to environmental degradation.
Correct answer: Very stable molecule having half-life 10 to 15 years- A. 60 - 100° C
- B. 80 - 100° C
- C. 40 - 60° C
- D. 60 - 80° C
Explanation: In the fractional distillation of crude oil, light naphtha is the fraction that typically boils in the range of about 30°C to 100°C.
Correct answer: 60 - 100° C- A. Addition Polymers
- B. Substitution Polymers
- C. Condensation Polymers
- D. Condensation Monomers
Explanation: Nylon-6,6 is formed by the reaction of two different monomers (hexamethylenediamine and adipic acid).
Correct answer: Condensation Polymers- A. Nylon-6,6
- B. Dacron
- C. Teflon
- D. Bakelite
Explanation: Dacron is the trade name for the polyester known as polyethylene terephthalate (PET).
Correct answer: Dacron- A. Polyethene
- B. Polyester
- C. Teflon
- D. Nylon
Explanation: Nylon is the common name for a family of synthetic polymers known as polyamides.
Correct answer: Nylon